This market refers to the tennis match between Karen Khachanov and Alexander Blockx in the US Open ATP, originally scheduled for September 9, 2026 at 11:30AM ET. This market will resolve to “Khachanov” if Karen Khachanov wins set 3. It will resolve to “Blockx” if Alexander Blockx wins set 3. If the match begins but set 3 is not completed with a winner determined (including the match ending before set 3 is reached), this market will resolve 50-50. If the match is canceled (not played at all) or play has not begun by September 23, 2026, 11:59 PM ET (14 days after the scheduled start), this market will resolve 50-50. Resolution will be based on official Grand Slam match statistics.